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Texas Instruments ADS1147EVM, Руководство пользователя

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Texas Instruments ADS1147EVM Скачать руководство пользователя страница 23

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Evaluating Performance with the ADCPro Software

With the GPIO configured as an output, the pushbutton switch controls the state of the output pin. When
pressed (as illustrated in

Figure 20

), the button lights up and the GPIO is set to a high state; when the

switch is dark (as

Figure 19

shows), the GPIO is in a low state.

Figure 20. GPIO Output Set to High

23

SBAU148B

–

June 2009

–

Revised May 2011

ADS1147EVM, ADS1247EVM, ADS1147EVM-PDK, ADS1247EVM-PDK

Submit Documentation Feedback

Copyright

©

2009

–

2011, Texas Instruments Incorporated

Содержание ADS1147EVM

Страница 1: ...riptions schematic diagrams and bill of materials are included in this document The following related documents are available through the Texas Instruments web site at http www ti com EVM Compatible Device Data Sheets Device Literature Number ADS1147 SBAS453 ADS1247 SBAS426A REF5020 SBOS410C OPA227 SBOS110A TPS3836L30 SLVS292D TPS79225 SLVS337B TPS72325 SLVS346B SN74LVC2G157 SCES207K PCA9535 SCPS1...

Страница 2: ...ection Timeout 15 12 Firmware Download Message Box 15 13 Firmware Download Progress Indicator 16 14 Firmware Download Complete Message Box 17 15 ADS1247 Multiplexer 18 16 I O Config Tab 19 17 Enabling VBIAS on a Channel 20 18 GPIO Tab 21 19 GPIO Set to Output Mode 22 20 GPIO Output Set to High 23 21 Power Ref Tab 24 22 Cal Tab 26 23 About Tab 27 24 Progress Bar While Collecting Data 28 List of Tab...

Страница 3: ...th new test and data collection plug ins The ADS1147EVM PDK ADS1247EVM PDK is controlled by a plug in running in ADCPro For more information about ADCPro see the ADCPro Analog to Digital Converter Evalutation Software User s Guide literature number SBAU128 available for download from the TI web site This manual covers the operation of both the ADS1147 ADS1247EVM and the ADS1147EVM PDK ADS1247EVM P...

Страница 4: ...og ground connections except J8 15 3 Digital Interface 3 1 Serial Data Interface The ADS1247EVM is designed to easily interface with multiple control platforms Samtec part numbers SSW 110 22 F D VS K and TSM 110 01 T DV P provide a convenient 10 pin dual row header socket combination at J7 This header socket provides access to the digital control and serial data pins of the ADC Consult Samtec at h...

Страница 5: ...ls on these pins 4 Power Supplies J3 is the power supply input connector Table 3 lists the configuration details for J3 Table 3 J3 Configuration Power Supply Input Pin No Pin Name Function Required J3 1 VA Unused No J3 2 VA Unused No J3 3 5VA 5V analog supply Always J3 4 5VA 5V analog supply Only in bipolar mode J3 5 DGND Digital ground input Yes J3 6 AGND Analog ground input Yes J3 7 1 8VD 1 8V d...

Страница 6: ... from U1 filtered and buffered through U2 This 2 048V may be used to drive the REF0P input or REF0P can be connected to the external reference input on J8 through switch S1 REF0P should not be connected to AVDD through switch S1 because this connection will violate the specification for the maximum reference input Figure 1 shows switch S1 as it appears on the EVM The low side of the reference REF0...

Страница 7: ...following recommendations J6 should be removed if the external clock source is used and the TOUT pin is still driven by a processor in order to avoid conflicts Jumper J2 can be used to always select the U8 oscillator DVDD position or allow the onboard external clock selection to be controlled by GPIO5 J7 19 as shown in Figure 2 Figure 2 Jumper J2 7 EVM Operation This section provides information o...

Страница 8: ...e ADS1247EVM PDK including setup program installation and program usage To prepare to evaluate the ADS1247 with the ADS1247EVM PDK complete the following steps Step 1 Install the ADCPro software if not already installed on a PC Step 2 Install the ADS1247EVM PDK EVM plug in software Step 3 Complete the USB driver installation process Step 4 Set up the ADS1247EVM PDK Step 5 Connect the ADS1247EVM PD...

Страница 9: ...t version on your CD Double click the file to run it then follow the instructions shown You can also use the ADCPro Update Check feature to check for newer versions of the ADS1247EVM PDK plug in once you have installed a version of it Follow the on screen prompts Once the ADCPro plug in installs you will be prompted to install the Virtual COM port driver as shown in Figure 4 Figure 4 Virtual COM P...

Страница 10: ...p the ADS1247EVM PDK Step 1 Unpack the ADS1247EVM PDK kit Step 2 Set the switches on the MMB3 as described below as shown in Figure 6 Set switch SW4 to the right Set the DAC switch SW5 to the OUT position to the right Figure 6 MMB3 Switch Locations 10 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK SBAU148B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Inst...

Страница 11: ...EVM into the MMB3 Check the pin alignment carefully before applying power to the PDK Step 4 Set the jumpers and switches on the ADS1247EVM as shown in Figure 3 note that these settings are the factory configured settings for the EVM 11 SBAU148B June 2009 Revised May 2011 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorpor...

Страница 12: ...bit digital to analog converter DAC that can be used as a signal source for an ADC under test and has a joystick for control of functions on the board when it is not controlled by a PC These features are experimental and not supported in the ADS1247EVM PDK at this time The MMB3 derives power from the USB interface and generates 5VD 3 3V and 1 8V as well as 5VA 5VA and 10V The 10V is supplied to th...

Страница 13: ...included in the ADS1247EVM PDK package The program currently runs only on Microsoft Windows platforms of Windows XP Windows Vista is NOT supported If this is the first time installing ADCPro and plug ins follow these procedures to run ADCPro and perform any necessary firmware installations Make sure the ADCPro software and device plug in software are installed from the CD ROM as described in Secti...

Страница 14: ...play Window Step 3 The ADS1247EVM PDK plug in window has a status area at the top of the screen When the plug in is first loaded the plug in searches for the board You will see a series of messages in the status area indicating this action 14 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK SBAU148B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments I...

Страница 15: ...ed Figure 11 Connection Timeout Step 5 The plug in detects whether or not the board has the correct firmware loaded The first time you use the ADS1247EVM PDK the firmware for the MMB3 may need to be downloaded to the MMB3 If the firmware needs to be loaded you will see a screen similar to that shown in Figure 12 Figure 12 Firmware Download Message Box 15 SBAU148B June 2009 Revised May 2011 ADS1147...

Страница 16: ...tes so the progress is updated in the message at the top of the ADS1247 plug in window as Figure 13 shows The firmware is saved in flash memory on the MMB3 so this operation should only need to be performed once Figure 13 Firmware Download Progress Indicator 16 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK SBAU148B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 ...

Страница 17: ...1247EVM PDK Plug in The ADS1247EVM PDK plug in for ADCPro provides complete control over all settings of the ADS1247 It consists of a tabbed interface see Figure 16 with different functions available on different tabs These controls are described in this section You can adjust the ADS1247EVM settings when you are not acquiring data During acquisition all controls are disabled and settings may not ...

Страница 18: ...ultiplexer in the ADS1247 Recall that the ADS1247 multiplexer is configured as shown in Figure 15 By default all channels are set as analog input the IDACs are not routed to any channel and the IDAC controls are disabled These controls are enabled when the correct IDAC settings are made on the Power Ref tab see Section 9 1 3 Figure 15 ADS1247 Multiplexer The radio buttons at the far right of the p...

Страница 19: ... a GPIO check the GPIO box as shown in Figure 16 Figure 16 I O Config Tab When an input is selected as a GPIO its label turns green and the IDAC controls for that channel are disabled 19 SBAU148B June 2009 Revised May 2011 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 20: ... the channel to convert Note that some of these channels are scaled by a factor when read refer to the ADS1247 data sheet to determine these factors The PGA Gain control sets the PGA gain and the Data Rate control sets the data rate for the device Note that the data rate can go quite low therefore if the block size is large the time it takes to collect a block of data can be quite long It is advis...

Страница 21: ...Figure 18 By default the GPIOs are enabled as inputs Pressing the Input button reads the state of the enabled inputs if the input is high the corresponding light turns green Figure 18 GPIO Tab 21 SBAU148B June 2009 Revised May 2011 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 22: ...utput the toggle switch can be switched to output mode as shown in Figure 19 Figure 19 GPIO Set to Output Mode 22 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK SBAU148B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 23: ...ssed as illustrated in Figure 20 the button lights up and the GPIO is set to a high state when the switch is dark as Figure 19 shows the GPIO is in a low state Figure 20 GPIO Output Set to High 23 SBAU148B June 2009 Revised May 2011 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 24: ... shown in Figure 21 This tab controls the selection of the power supply mode reference sources and IDACs Figure 21 Power Ref Tab 24 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK SBAU148B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 25: ...enabled only in modes that allow these pins to be used as GPIOs The Internal Reference control selects whether the reference is off on or follows the START signal refer to the ADS1247 data sheet for more details on these choices When the internal reference is enabled the IDAC controls are enabled as well because the IDACs cannot function unless the internal reference is turned on Note that the int...

Страница 26: ...lf calibration the offset and full scale register values are then updated on the plug in screen You may also write to these registers by typing in hex values in the New fields then pressing the Set button You may read the values at any time by pressing the Read button 26 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK SBAU148B June 2009 Revised May 2011 Submit Documentation Feedback Copyright ...

Страница 27: ...cators show the version numbers of the plug in and firmware code respectively The ID indicator shows the value of the ID 3 0 bits in the ADS1247 ID register The Notes indicator may show relevant notes about the plug in or firmware code if there are any 27 SBAU148B June 2009 Revised May 2011 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK Submit Documentation Feedback Copyright 2009 2011 Texas ...

Страница 28: ...DS1247EVM PDK plug in disables all the front panel controls while acquiring and displays a progress bar as shown in Figure 24 Figure 24 Progress Bar While Collecting Data For more information on testing analog to digital converters in general and using ADCPro and Test plug ins refer to the ADCPro User Guide 28 ADS1147EVM ADS1247EVM ADS1147EVM PDK ADS1247EVM PDK SBAU148B June 2009 Revised May 2011 ...

Страница 29: ...apacitor X7R Ceramic 0 1μF TDK C1608X7R1E104KT C11 C13 C15 10 25WV Size 0603 C21 C28 C29 5 1 0 15μF C14 Capacitor X7R Ceramic 0 15μF Murata GRM188R71C154KA01D 10 16WV Size 0603 6 7 10μF C16 C20 C22 Capacitor X5R Ceramic 10μF TDK C2012X5R0J106MT C23 20 6 3WV Size 0805 7 4 47pF C24 C27 Capacitor C0G Ceramic 47pF TDK C1608C0G1H470JT 5 50WV Size 0603 8 1 10nF C9 Capacitor C0G Ceramic 10nF TDK C1608C0G...

Страница 30: ... SS14MDP2 33 0 TP1 TP5 PCB Test Point Mini Loop Through Hole 34 1 TP6 PCB Test Point Large Loop Keystone 5011 Through Hole Electronics 35 1 U1 Precision Voltage Reference Texas REF5020ID 2 048V Instruments 36 1 U2 Precision Operational Amplifier Texas OPA227U Instruments 37 1 U3 Texas PCA9535RGE 16 Bit I2 C I O Expander Instruments 38 1 U4 Inverter Single Gate Texas SN74AHCT1G04DBVR Instruments 39...

Страница 31: ...VS K IN 1 GND 2 EN 3 OUT 5 BYP 4 U6 TPS79225DBV Q1 FRC_FDN302P 2 4 5 3 U5 SN74LVC1G07DBV R11 100K 5V 5V Q3 FRC_FDN337N 5V 2 4 5 3 U4 SN74AHCT1G04DBV 5V 3 3V VA 2 5VA 4 AGND 6 VD1 8 5VD 10 VA 1 5VA 3 DGND 5 1 8VD 7 3 3VD 9 J3 DAUGHTER POWER ADC AVDD ADC AVSS DIGITAL 3 3V DGND AGND DVDD JUMPER FUNCTIONS D4 ONS_MMBZ5231BLT1 J3A TOP SAM_TSM 105 01 L DV P J3B BOTTOM SAM_SSW 105 22 F D VS K IN 2 GND 1 E...

Страница 32: ... product This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI produc...

Страница 33: ...horized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications and acknowledge ...

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